Estimativa do saldo de radiação sobre um cultivo de videira BRS Clara com e sem tela de sombreamento.

O objetivo deste trabalho foi elaborar modelos de estimativa do saldo de radiação sobre videiras cultivadas na região noroeste de São Paulo a partir da radiação solar global.Resumo

Conhecimento dos serviços da FCCN junto da comunidade científica e tecnológica nacional: um inquérito por questionário

O relatório aqui apresentado resulta de uma prestação de serviços, por parte de uma equipa do ISCTE-IUL, à FCCN (Fundação para a Computação Científica Nacional). Esta visou apoiar o lançamento de um inquérito por questionário aos membros da comunidade científica e tecnológica nacional, com o fim de aferir a perceção acerca dos serviços da FCCN, designadamente em termos de Conectividade, Computação, Colaboração, Conhecimento e Segurança.info:eu-repo/semantics/publishedVersio

Sistemas de Preparo do Solo e Características Espectroscópicas da Matéria Orgânica em Ambientes Tropicais e Subtropicais Brasileiros.

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Percentual of body weight loss of horses submitted to endurance exercise in West Center of Brazil

Objetivou-se com esse estudo avaliar o percentual de perdas de peso sofridas por cavalos submetidos a provas de enduro de 20, 40, 80 e 160 km de distância sob clima tropical na região central do Brasil (Brasília-DF). Os animais foram pesados antes, durante e após as provas com a utilização de uma balança portátil. Observou-se percentuais de perdas de peso de 3,47±1,86%, 5,93±4,35%; 4,69±2,01% e 4,53±2,11%, nas provas de 20, 40, 80 e 160 Km, respectivamente. Tais valores foram significativamente maiores ao final da primeira etapa das provas quando comparados com o peso antes das provas, no repouso revelando importante redução de perdas na continuidade das provas, provavelmente devido ao melhor condicionamento dos animais além do livre acesso a água e feno durante os períodos obrigatórios de descanso. A utilização de balanças portáteis deve ser estimulada em provas equestres de longa duração, como uma ferramenta de monitoramento de perdas de peso imperceptíveis por veterinários durante as competições. Os resultados obtidos revelaram que mesmo animais treinados e condicionados a beber água e se alimentar durante esforços prolongados estão sujeitos a importantes perdas de peso. _________________________________________________________________________________ ABSTRACTThe purpose of this study was to evaluate the percentage of body weight loss suffered from horses submitted to endurance rides of 20, 40, 80 and 160 Km distance under tropical climate in West Center of Brazil (Brasilia-DF). Horses were weighted before, during and after the competition, with a portable scale. It was noticed percentual body weight losses of 3,47±1,86%, 5,93±4,35%; 4,69±2,01% and 4,53±2,11%, in 20, 40, 80 and 160 Km rides, respectively. These values were higher in the first weighting point, compared to basal values, with an important reduction throughout subsequent rings of rides, probably due to a better animal condition and free intake of water and forage, during the mandatory rest periods. The use of portable scales should be used for prolonged rides as a tool for veterinarians to monitor insensible body weight losses of horses in this kind of exercise. Data also revealed that even trained horses are susceptible to important body weight losses

New phototriggers based on coumarins with extended π-systems

Comunicação em painel P35 no XXIV Encontro Nacional da Sociedade de Portuguesa de Química, Coimbra, Portugal, 1-3 Julho 2015The present work describes the synthesis of new coumarin derivatives possessing an extended π-system, in order to bathocromically shift the wavelength of maximum absorption, and consequently of photolysis. These compounds were tested as phototriggers of two neurotransmitter amino acids, glycine and β-alanine, at 254, 300, 350 and 419 nm, in a Rayonet RPR-100 photochemical reactor, and the release of the active compound was monitored by HPLC-UV detection, with collection of kinetic data.Fundação para a Ciência e Tecnologia (FCT, Portugal) for financial support to the NMR portuguese network (PTNMR, Bruker Avance III 400-Univ. Minho), FCT and FEDER (European Fund for Regional Development) -COMPETE-QREN-EU for financial support to Research Centre of Chemistry, CQ/UM [PEst-C/QUI/UI0686/2013 (FCOMP -01-0124-FEDER-037302)]info:eu-repo/semantics/publishedVersio

Use of advisory systems and plastic covering in the control of downy mildew on vines of São Paulo, Brazil.

The Northwest region of the State of São Paulo is one of the main producers of table grapes in Brazil. However, the climate of this region is highly favorable for fungal diseases during the growing season. The use of disease advisory systems and plastic covers are promising alternatives for rationalize the use of fungicides for disease control. Thus, the objective of this study was to evaluate the efficacy of the combination of advisory systems and plastic covering in the control of downy mildew (Plasmopara viticola) on vineyards of the Northwest region of State of São Paulo, Brazil. The experiments were carried out at the EMBRAPA - Tropical Viticulture Experimental Station, located in Jales, SP, Brazil. Three rows of 120 m of the seedless grape cultivar ?BRS Morena? (Vitis vinifera), spaced with 3.0 m between plants were conducted during 2012 and 2013 growing seasons. Half of the vineyard was covered with braided polypropylene plastic film installed over a metallic arc-shaped structure and the other half with black screen, with 18% of shading. The experimental design was randomized blocks composed of five treatments, with six repetitions per covered environment. The treatments were defined by the different grapevine downy mildew management : (CO) Control (no sprays against downy mildew); (CA) Conventional control (calendar); (BA) Advisory system 'Rule 3-10'; (MA25) Advisory system with low-infection efficiency - i0 > 25%; and (MA75) Advisory system with high infection efficiency ? i0 > 75%. According to the results, the plastic cover alone was not effective in controlling downy mildew. Under plastic cover, all advisory systems tested were as effective as the control provided by treatment calendar (CA), however, with 75% less fungicide application (MA75) than CA.Resumo expandido

Photorelease of neurotransmitter amino acids from coumarin derivatives

Comunicação em painel QS43 no livro de resumos do XX Encontro Luso-Galego de QuímicaIn this work it is presented the photorelease of two model neurotransmitter amino acids, namely glycine and β-alanine, from two different coumarins. These model neurotransmitters were chosen due to their biological importance as well as their pharmacological activities. The coumarin-amino acid conjugates were irradiated at 245, 300, 350 and 419 nm using a Rayonet RPR-100 photochemical reactor and the release of the active compound was monitored by HPLC-UV detection, with collection of kinetic data.Fundação para a Ciência e a Tecnologia (FCT